[IMP]Introduce float_time concept in Timesheet Widget.
[IMP]Change Variable name.
[IMP] don't format 0 values
[IMP] hr_timesheet_sheet: dispay timesheets as time_float instead of float
[FIX] project_issue: fixed access rights issues when truing to find suggested partners.
[FIX] Chatter: fixed suggested recipients, when having no email, unchecking the box was not taken into account.